Publications and data

Everything I have written, everything you can download, and the record of where it has been said out loud.

Papers

Selected publications

Forty-two peer-reviewed papers since 2011, nine as first author. These are the twelve worth starting with.

2026

Halvorsen, M., Rehn, P. & Solberg, K.

Thirty-one years of soil carbon on the Storbäcken plots: the recovery is slower than the models allow

Journal of Boreal Ecology 41(2), 188-204 Open access

Article

Lind, T., Halvorsen, M. & Kekkonen, S.

First colonisers set the trajectory: fungal assembly in the 1998 deadwood cohort

Ecosystem Dynamics 34(1), 12-31

Article

2025

Rehn, P., Halvorsen, M. & Lindqvist, T.

Ditch blocking raises the water table before it changes the flux: four paired mires in Västerbotten

Northern Soil Science 18, 41-59 Open access

Article

Nyman, O. & Halvorsen, M.

Six seasons of prescribed fire at Klippen: surface loss, mineral soil unchanged

Nordic Journal of Forest Research 52(4), 388-402

Article

2024

Halvorsen, M.

What a long-term plot is for, and what it cannot tell you

Methods in Field Ecology 9(4), 512-518 Open access

Review

Halvorsen, M. & Kekkonen, S.

Change-point models find the harvest signal that linear trends miss

Methods in Field Ecology 9(1), 44-61

Methods

2023

Halvorsen, M. & Åkerlund, B.

Mass loss in Picea abies deadwood over twenty-five years is governed by the first fungal coloniser

Ecosystem Dynamics 31(1), 77-94

Article

Halvorsen, M., Virtanen, J., Sørensen, A. & twenty-six others

A pooled decay model for Fennoscandian deadwood, from twenty-nine contributed datasets

Journal of Boreal Ecology 38(3), 301-322 Open access

Synthesis

2022

Halvorsen, M., Nyman, A. & Rehn, P.

The Storbäcken plot network, 1994-2022: an open record of soil, litter and deadwood

Boreal Data Archive Version 4 Download

Dataset

2021

Halvorsen, M.

Inheriting a dataset: protocol, provenance and the ethics of not changing anything

Nordic Journal of Forest Research 48(2), 155-166 Open access

Essay

2020

Rehn, P. & Halvorsen, M.

Eighty years of ditching in Västerbotten, reconstructed from county board records

Northern Soil Science 13, 88-107

Article

2019

Halvorsen, M. & Åkerlund, B.

Bulk density corrections for the 1994-2001 Storbäcken records, and what we got wrong

Journal of Boreal Ecology 34(4), 590-597 Open access

Corrigendum

Twelve of forty-two, chosen because somebody has actually asked me about each one. Write for a PDF of anything that is not open access; it will be with you the same week.

Open data

Everything you can download

Deposited, versioned and citable. Use it without asking, and tell me if you find something wrong.

10.0000/boreal.2026.4

The Storbäcken plot network, 1994-2026

Every soil, litter and deadwood record from the full network, cleaned and versioned, with the original notebook scans alongside. Known errors are annotated rather than silently fixed, and 1,140 records are flagged uncertain so you can decide for yourself.

Format
CSV, 6 tables + scans
Size
41 MB
Licence
CC BY 4.0
Deposited
March 2026, version 4

Open the archive

10.0000/boreal.2025.2

Paired mire hydrology, Rävmyran

Water table, chamber flux and vegetation records from four drained and four rewetted mires, half-hourly where the loggers allow, from 2019 onward. The gaps where a logger flooded are left as gaps.

Format
CSV and NetCDF
Size
2.1 GB
Licence
CC BY 4.0
Deposited
November 2025, version 2

Open the archive

10.0000/boreal.2023.7

Deadwood decay, the 1998 log cohort

Mass, density and fungal survey for 180 marked Picea abies logs, remeasured at two to four year intervals for twenty-five years. As far as we know the longest series of its kind anywhere.

Format
CSV, 3 tables
Size
4 MB
Licence
CC BY 4.0
Deposited
June 2023, version 3

Open the archive

github.com/example/plotr

plotr - the analysis pipeline

The R package the group runs everything through: import, quality control, the mixed models and every figure in the last six papers. Written to be readable rather than clever, and tested, because somebody will inherit it.

Language
R
Licence
MIT
Tests
yes, and they pass
Maintained
actively

View the repository

Record

Talks, honours and service

Grouped, dated and not padded. The reviewing is the part that actually takes the time.

Invited talks

2026

What thirty-one years of plots will and will not tell you

Keynote, Nordic Forest Congress, Oslo

2025

Soil carbon after felling: the recovery nobody budgets for

Plenary, European Boreal Symposium, Joensuu

2024

Inheriting somebody else's dataset

Public lecture, Umeå Science Week

2023

Is rewetting worth what it costs?

Parliamentary committee on land use, Stockholm

Honours

2025

Åkerlund Prize for Field Ecology

Nordic Research Council

2022

Docent, Forest Ecology

Nordvik University

2019

Early Career Award

Society for Boreal Science

2011

Best doctoral thesis in ecology

Bjørnfjord University

Service

2023 -

Associate Editor

Journal of Boreal Ecology

2021 -

Panel member, research infrastructure

Nordic Research Council

2020 - 2023

Chair, doctoral admissions

Faculty of Forest Sciences, Nordvik

2011 -

Reviewer for twelve journals

Around twenty manuscripts a year

Nothing here is paywalled by choice

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If a paper is behind a subscription and you cannot get past it, write. Author copies exist for every one of them and sending you one costs me nothing.

Request a paper

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Download the CV

Every publication, in one PDF

Bibliometrics on request, with the usual caveats about what they measure.